Lazy Properties

Lazy Properties are a special kind of property that will be initialized delayed, on first access.

A property can be marked as lazy by prefixing the Property keyword with Lazy. Lazy properties must provide an initializer, and cannot provide custom getter or setter code.

Under the hood, the compiler will generate a property getter that will ensure the initializer is run, in a thread-safe fashion, the first and only the first time the property is read.

Public Lazy Property ExpensiveToCreate = New ExpensiveObject()

If a lazy property is not accessed as part of the execution flow of a program, the initializer will never run. A writable lazy property can still be explicitly set to a value, from code, to override the default value. If this happens before the property is read the first time, the initializer will never be executed.

See Also